Planet Minecraft

Here's my problem, today I joined Minecraft.net to get the demo version of minecraft to see if it would work on my computer, well after downloading it the loading screen says "Loading Done", but nothing happens. So, I looked my problem up on google, and it said to delete the bin, (there was nothing in there to begin with), and deleted it, relaunched, same loading problem. So this time I deleted everything and redownloaded the demo, again same problem. Can anyone help me?

[Also, I know it's not my java, because I just downloaded it earlier.]

Flash Player Error???? What are you using Mac or Windows?? I might be able to help....

I'm using windows 7.

EDIT: Flash player might be problem.. >_> downloading it now.
Also, I have a slow internet connection, but I am 99% sure, it is not my internet connection that is the problem, as I have downloaded hundreds of songs, programs, ext, ext and have not had any problems.